Combine uuid-old and uuid branch changes

- Switch to binary 16 for UUID keys
- Remove AccountScopedRecord base class, all model use binary uuids now
- Fix the search sql to serialize uuids properly
- Patch the MySQL schema dumper to output binary lengths

app/models/card.rb

@@ -1,4 +1,4 @@
-class Card < AccountScopedRecord
+class Card < ApplicationRecord
   include Assignable, Attachments, Broadcastable, Closeable, Colored, Entropic, Eventable,
     Golden, Mentions, Multistep, Pinnable, Postponable, Promptable,
     Readable, Searchable, Stallable, Statuses, Taggable, Triageable, Watchable